You have an user account with administrators right on a Windows 7 machine. You can create/share/access normal folders remotely. However, you cannot access administrative shares (e.g. \\mywin7\c$).
Solutions that work for me:
- On the Windows 7 machine, make sure the Home/Work profile has File and Printer Sharing enabled.
- On the Windows 7 machine, create an 32-bit DWORD registry key LocalAccountTokenFilterPolicy with a value of 1 under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System.
- On the Windows 7 machine, leave any joined Homegroup.
See reference link for detailed steps.